.swiper-bg {
  background-image: url(../img/slide/bg.jpg);
  background-repeat: no-repeat;
  background-position: 0 bottom;
  -moz-transition: background-position 1s ease-in 0s;
  -webkit-transition: background-position 1s ease-in 0s;
  -o-transition: background-position 1s ease-in 0s;
  transition: background-position 1s ease-in 0s;
  -webkit-transform: translate3d(0,0,0);
  -moz-transform: translate3d(0,0,0);
  -ms-transform: translate3d(0,0,0);
  -o-transform: translate3d(0,0,0);
  transform: translate3d(0,0,0);
  &.swiper-bg-1 {
    background-position-x: -58px;
  }
  &.swiper-bg-2 {
    background-position-x: -116px;
  }
  &.swiper-bg-3 {
    background-position-x: -174px;
  }
  &.swiper-bg-4 {
    background-position-x: -232px;
  }
  &.swiper-bg-5 {
    background-position-x: -290px;
  }
  &.swiper-bg-7 {
    background-position-x: -347px;
  }
}